Message

Value MUST be part of code list 'Measured attribute code for despatch advice (UNCL6313 Subset) T120'.

Context
/ubl:DespatchAdvice/cac:DespatchLine/cac:Item/cac:Dimension/cbc:AttributeID
Test
(some $code in $clUNCL6313-T120 satisfies $code = normalize-space(text()))
Code lists
Measured attribute code for despatch advice (UNCL6313 Subset) T120
Usage
/ ubl:DespatchAdvice / cac:DespatchLine / cac:Item / cac:Dimension / cbc:AttributeID